Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
Sodium carbonate
1. Basic Information
Name: Sodium carbonate
Alias: Soda ash, calcined soda, anhydrous sodium carbonate
CAS No.: 497-19-8
Molecular Formula: Na?CO?
Molecular Weight: 105.99
Category: Inorganic alkaline salt, general industrial raw material, laboratory analytical reagent
2. Physical and Chemical Properties
Physical Properties
- Appearance: White crystalline powder or granular solid
- Odor: Odorless
- Solubility: Soluble in water (solubility rises with temperature); insoluble in ethanol, acetone, ether
- Melting point: 851 °C; decomposes above high temperature to release CO?
- Hygroscopy: Slightly hygroscopic, easily absorbs water to form hydrates (Na?CO?·10H?O, Na?CO?·H?O)
- Aqueous property: Aqueous solution is strongly alkaline, pH of 1% solution ≈11.5
Chemical Properties
- Molecular structure: Ionic salt composed of Na? and carbonate anion CO?2?
- Reaction with acid: Reacts with all acids to produce carbon dioxide, water and corresponding sodium salt
- Hydrolysis: Carbonate undergoes two-stage hydrolysis in water to generate OH?, showing alkalinity
- Thermal stability: Stable at room temperature; only decomposes above 1500 °C
- Precipitation reaction: Reacts with calcium, magnesium, barium ions to form insoluble carbonate precipitates
- Compatibility: Compatible with neutral inorganic salts; incompatible with strong acids, ammonium salts, soluble heavy metal salts
3. Main Application Fields
1. Glass Industry (Core Application)
Main raw material for flat glass, bottle glass, optical glass; acts as flux to lower melting temperature of silica
2. Daily Chemical & Detergent
Raw material for laundry powder, soap, water softener; neutralizer and pH regulator
3. Water Treatment
Adjust pH value of industrial wastewater, remove calcium/magnesium hardness ions
4. Laboratory & Food Industry
- Analytical reagent for titration standard solution preparation
- Food grade used as acidity regulator, bulking agent in pastry, beverage
5. Papermaking & Textile
Boiling agent for cotton fiber degumming; pulp pH regulator
4. Quality Specification Table
| Test Item | Standard Specification |
| CAS Number | 497-19-8 |
| Molecular Formula | Na?CO? |
| Appearance | Uniform white powder/granule without lumps |
| Purity | Industrial grade ≥98.0%; Food grade ≥99.2%; Analytical grade ≥99.8% |
| Water insoluble matter | ≤0.01% (AR grade) |
| Chloride (Cl?) | ≤0.002% |
| Heavy Metals (Pb) | ≤10 ppm (food grade) |
| Packaging | 25kg woven bag with PE inner film / plastic drum |
| Storage Condition | Sealed dry warehouse below 25 °C; avoid damp and acid raw materials |
| Transportation Requirement | Common inorganic alkaline solid, moisture-proof packaging, separate from acid goods |
| Shelf Life | 36 months under intact sealed storage |
Safety Warning
Mild alkaline irritant solid. Dust irritates eyes, nasal tract and respiratory tract; direct contact dissolves skin sebum and causes dry, corrosive irritation. Operations require ventilation with dust mask and rubber gloves. If splashed into eyes, rinse continuously with plenty of clean water for more than 15 minutes. Waste water can be neutralized with dilute acid before discharge; solid waste belongs to general inorganic industrial waste.
...
Product
